21.  It can be savory or sweet, and either makes a simple, interesting substitute for a standard part of the Thanksgiving meal.

22.  It passed the market test with flying colors and became a standard part of the analysis of economists.

23.  Its products are built from standard off-the-shelf parts that are easy to install and maintain.

24.  Jay Leno, David Letterman and others have made Enron a standard part of opening monologues and skits.

25.  Local retailers assemble their machines using industry standard parts rather than the proprietary components used in many brand-name systems.

26.  Microchips are fairly standard parts, manufactured in bulk and tested for quality before they are allowed inside a computer.

27.  Milpitas-based Power Computing has been able to keep prices down by using standard PC parts in construction, rather than relying on proprietary Apple parts.

28.  Point work is a standard part of classical training for women.

29.  Power struggles between Albany and New York City are a standard part of local political life.

30.  Regular human testing is a standard part of tracking viruses, but is also a sign that health officials are taking the possibility of human infections seriously.